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<p>Grouting materials play a critical role in road engineering applications. However, traditional cementitious or polymer-based grouting materials have defects such as limited adjustability of fluidity and mechanical strength high energy consumption, and serious environmental pollution. To address these challenges and promote resource recovery, this study utilized industrial solid wastes—slag (SL), fly ash (FA), and anhydrite (AH)—whose disposal poses environmental risks. These materials were combined with citric acid (CA) and anhydrous borax (AB) to develop a semi-flexible pavement grout based on a geopolymer matrix. The resultant material demonstrates tunability in both curing time (30–120 min) and compressive strength (10–60 MPa), achieved through systematic composition optimization. Through mechanical property testing and microstructural analysis, the curing mechanism of the material was elucidated. Furthermore, based on the requirements of pavement engineering applications, the high-temperature stability, low-temperature crack resistance, moisture stability, and fatigue characteristics of semi-flexible pavement asphalt materials were systematically evaluated, demonstrating their excellent and practical road performance.. This study provides theoretical foundations and technical support for enhancing pavement material performance and promoting energy-saving and environmentally friendly road construction.</p>

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Preparation and performance investigation of a geopolymer-based road grouting material with adjustable compressive strength and curing rate

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Haiwei Shen,
  • Mengting Xu,
  • Xinqi Liu,
  • Zhongliang Pi,
  • Shiyang Wang,
  • Yanguang Wu,
  • Tao Bai

摘要

Grouting materials play a critical role in road engineering applications. However, traditional cementitious or polymer-based grouting materials have defects such as limited adjustability of fluidity and mechanical strength high energy consumption, and serious environmental pollution. To address these challenges and promote resource recovery, this study utilized industrial solid wastes—slag (SL), fly ash (FA), and anhydrite (AH)—whose disposal poses environmental risks. These materials were combined with citric acid (CA) and anhydrous borax (AB) to develop a semi-flexible pavement grout based on a geopolymer matrix. The resultant material demonstrates tunability in both curing time (30–120 min) and compressive strength (10–60 MPa), achieved through systematic composition optimization. Through mechanical property testing and microstructural analysis, the curing mechanism of the material was elucidated. Furthermore, based on the requirements of pavement engineering applications, the high-temperature stability, low-temperature crack resistance, moisture stability, and fatigue characteristics of semi-flexible pavement asphalt materials were systematically evaluated, demonstrating their excellent and practical road performance.. This study provides theoretical foundations and technical support for enhancing pavement material performance and promoting energy-saving and environmentally friendly road construction.